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(11)

EP 3 335 275 A1

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(43) Date of publication: 20.06.2018 Bulletin 2018/25 (21) Application number: 15906825.3 (22) Date of filing: 20.10.2015

(51) International Patent Classification (IPC):  H01Q 7/00(2006.01) G01V 3/28(2006.01) (86) International application number: PCT/US2015/056457 (87) International publication number: WO 2017/069742 (27.04.2017 Gazette 2017/17)

(84) Designated Contracting States: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR Designated Extension States: BA ME Designated Validation States: MA (71) Applicant: Halliburton Energy Services, Inc. Houston, TX 77032-3219 (US)	(72) Inventors: MA, Jin Singapore 640559 (SG) WILSON, Glenn Andrew Singapore 109703 (SG) DONDERICI, Burkay Houston, Texas 77098 (US) (74) Representative: Hoffmann Eitle  Patent- und Rechtsanwälte PartmbB Arabellastraße 30 81925 München 81925 München (DE)